Superhydrophobicity and Superhydrophilicy of Regular Nanopatterns
Superhydrophobicity and Superhydrophilicy of Regular Nanopatterns
The hydrophilicity, hydrophobicity, and sliding behaviour of water droplets on nanoasperities of controlled dimensions were investigated experimentally. We show that the "hemi-wicking"theory for hydrophilic SiO2 samples successfully predicts the experimental advancing angles and that the same patterns, after silanization, become superhydrophobic in agreement with the Cassie-Baxter and Wenzel theories. Our model tophographies have the same dimensional scale of some naturally occurring structures that exhibit similar wetting properties. Our results confirm that a forest of hydrophilic/hydrophobic slender pillars is the most effective superwettable/water-repellent configuration. It is shown that the shape and curvature of the edges of the aspertieis play an important role in determining the advancing angles.
2097-2103
Martines, Elena
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Seunarine, Kris
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Morgan, Hywel
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Gadegaard, Nikolaj
bf72c3d1-e6a7-48b4-a968-c496b655bd98
Wilkinson, Chris DW
95c632cf-1213-4f90-9966-4cf4f60dd83f
Riehle, Mathis O
e608768c-0da2-40a6-af4c-44258fc86261
December 2005
Martines, Elena
59495e65-fc7b-43b4-b172-5c41cea4d626
Seunarine, Kris
7a429cda-848c-4384-a38b-43e78b190c03
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Gadegaard, Nikolaj
bf72c3d1-e6a7-48b4-a968-c496b655bd98
Wilkinson, Chris DW
95c632cf-1213-4f90-9966-4cf4f60dd83f
Riehle, Mathis O
e608768c-0da2-40a6-af4c-44258fc86261
Martines, Elena, Seunarine, Kris, Morgan, Hywel, Gadegaard, Nikolaj, Wilkinson, Chris DW and Riehle, Mathis O
(2005)
Superhydrophobicity and Superhydrophilicy of Regular Nanopatterns.
Nano Letters, 5 (10), .
Abstract
The hydrophilicity, hydrophobicity, and sliding behaviour of water droplets on nanoasperities of controlled dimensions were investigated experimentally. We show that the "hemi-wicking"theory for hydrophilic SiO2 samples successfully predicts the experimental advancing angles and that the same patterns, after silanization, become superhydrophobic in agreement with the Cassie-Baxter and Wenzel theories. Our model tophographies have the same dimensional scale of some naturally occurring structures that exhibit similar wetting properties. Our results confirm that a forest of hydrophilic/hydrophobic slender pillars is the most effective superwettable/water-repellent configuration. It is shown that the shape and curvature of the edges of the aspertieis play an important role in determining the advancing angles.
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Published date: December 2005
Organisations:
Nanoelectronics and Nanotechnology
Identifiers
Local EPrints ID: 263182
URI: http://eprints.soton.ac.uk/id/eprint/263182
ISSN: 1530-6984
PURE UUID: b74fef99-676c-4dda-957e-757c73800f18
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Date deposited: 14 Nov 2006
Last modified: 15 Mar 2024 03:18
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Contributors
Author:
Elena Martines
Author:
Kris Seunarine
Author:
Hywel Morgan
Author:
Nikolaj Gadegaard
Author:
Chris DW Wilkinson
Author:
Mathis O Riehle
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